Elevator dredging machine



(No Model.) Y 2 Sheets-sheet 2.

J. KENNEDY.

ELEVATOR DRBDGING MACHINE. No. 279,570. Patented June 19,1883.

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N. PETERS. Phalo-Limagnpw. washingmn. D C.

UNITED- STATES PATENT EFICE.

JOHN KENNEDY, OF MONTREAL, QUEBEC, CANADA.

ELEVATOR DREDGlNG-IVIACHINE.

SPECIFICATION forming part of` Letters Patent No. 279,570, dated June 19, 1883.

Application filed August 3, 188i?. (No mndcl.)

To all who/2t t may concern,.-

Be it known that I, JOHN KENNEDY, of the city and district of Montreal, in the Province of Quebec and Dominion of Canada,l civil engineer, have invented certain new and useful Improvements. in Elevator Dredging- Ma two tumblers, one (to which the power is generally applied) being situated at the upper and the other at the lower end of a long swinging frame or ladder. By the ordinary construction hitherto in use, each of these blick-` ets, which constitutes one composite link of the chai n, is mounted upon a steel or iron base or bottom having a series of jointed bars or ribs projecting downward. Consequently the faces of the tumbler in its revolution impinge only upon a portion of the actual bottom of the buckets, thereby causing a very deleterious wear and tear upon all the surfaces when brought into contact with the faces of the tumblers. rIhe intermediate links are also usually formedof a pair of separate and independent jointed bars fitted to work between those of the buckets. Thus the bearing-surfaces both of the links and tumblers are subject to much useless and hurtful waste and loss of metal.

rlhe objects of my present improvements are, first, to provide a full bearing over the entire surface of the tumbler and bucket-bottom for each of the buckets, and also for the intermediate links; secondly, to protect the faces of the tumblers from the unequal and destructive grinding and cutting action of the links; and,

thirdly, tov effect an important economy by providing for the renewal of parts liable to be trated by the accompanying drawings, in which- Figure lis avertical section, and Fig. 2 an end vi ew, of one of myimproved buckets complete. Fig. 3 is a pl'an of the bucket-bottom, and 4 a transverse section on the line X Y in Fig. l. Fig. 5 is a plan, Fig. 6, alongitudinal elevation, and Fig. 7 a transverse section, of one of the intermediate links. Figs. S and 9 show details of the construction of my improved tumbler, chiefly with reference to the lower tumbler.

In these drawings similar letters indicate like parts throughout the several views.

Letter A is the bucket-bottom, which is preferably made of cast-steel, having the link-eyes a c for the reception of the link-pins b b, cast upon it at either extremity. Itis also formed with the solid bottom B, the sides c c, middle ribs, d d, and ianges e e, for attachingthebucketbody C, the whole being in one piece and forming a species of hollow boX-girder, the lower surface of which is a plain rectangular solid plate corresponding with the face of the tumbler, which is thus provided with the greatest possible amount of bearing-surface to resist the wearing and grinding action in working, and consequently to render the whole apparatus more durable and efficient.

By the construction heretofore generally in use the plate B, or` its equivalent, forms the upper member or flange of this composite `girder and at the same time the actual bottom of the bucket or receptacle for the material excavated; but by my improved mode of construction this plate is transferred to the lower V side, so as to give the requisite strength and wearing-surface with a smaller amount of material;

In order to obviate any tendency to the accumulation and adhesion of mud and clay in the bucket-bottom A and between the middle ribs, d d, a false bottom, of sheet iron or other suitable material, is attached to the top of the main bucket-bottom A; or, if preferred, the spaces between the ribs may bev filled Hush with wood orother suitable material. The intermediate links, as shown in Figs. 5, 6, and 7, are constructed in a similar manner and for similar purposes, only modified to suit their peculiar functions, and by reference toV the same letters as above its construction will be IOO ' @www readily understood. The upper ianges, g g, and ribs 71y hare introduced for the purpose of giving the requisite rigidity, which in the bucket-links is supplied by the bueket-bottom f and the body C.

In Figs. 8 and 9 is shown Iny improved construction of tumbler, as more specially designed for the lower tumbler, but which may also, if convenient, be applied in some of its features to the construction of the upper tumbler.

Letters D D indicate the ends of the ladder or swinging` frame, provided with suitable .bushes or bearings, j j, for the reception and adjustment of the gudgeons E E, upon which the tumbler is fitted to rotate. The gudgeons E E are formed in separate pieces from the body of the tumbler, to which they are attached by the bolts k k, or otherwise, the object of this arrangement being to `facilitate the renewal of the gudgeons E E and bushes j j, which are very liable to be worn away by the action of the machine.

The outer easing or shell, H, ofthe tumbler is fixed to the end disks, J J, by bolts or rivets, and is sheathed externally over its entire surface with steel plates Z l, riveted or bolted to the casing H, layers of oak, or other suitable partially elastic but indestructible material, man, being interposed between the steel and cast-iron, for the purpose of .facilitating the construction by obviating the necessity of planing the faces of the tumbler, and also for relieving the rivets or bolts from the jarring and concussion caused by the working of the machine.

I am aware that prior to my invention elevator-dredgi11g-machine buckets have been made with bottoms formed in one piece with the necessary jointed links, &c., and that various means have been proposed and adopted for reducing t-he wearing action and for replacing the parts worn. I am also aware that tumbler-faces have been in use prior to my in-' vention either wholly or partially protected by steel plates, and that tumblers have been constructed with end disks and casings or shells bolted together in the manner abovedescribed. I do not, therefore, broadly claim any of these features, nor do l, on the other hand, restrict my claims to the particular forms herein described, and represented in the draw .i ngs, so long as the peculiar features of any part of my invention are retained; but

That I do claim as my invention, and desire to secure by Letters Patent, is as follows, viz:

l. In an elevator dredging-machine where each bucket forms one link in an endless chain propelled by tumblers, a bucket-bottom formed with a solid and continuous plane plate on the lower side of the link-eyes, and having sides, ends, and ribs extending' upward to the body of the bucket, the whole being formed in one piece, substantially as shown, and for the purposes specified.

2. In an elevator dredging-Inachine, in combination with a bucket-bottom having a solid and continuous plane plate on the lower sideof the link-eyes, and h( ving sides, ends, and ribs extending upward to the body of t-he bucket, a false bottom attached to itsA upper side and to the body of the bucket, substantially asvand for the purpose speciiied.

In an elevator dredging-machine, a coniposite intermediate link for the bucket-chain, having two or more ribs for the link-eyes, connected together at the base by asolid and continuous plane plate with suitable strengthening-ribs, the whole being formed iu one piece, substantially as and for the purposes specified.

4. The combination, with the side disks of the tumbler, of the removable gudgeons E E, secured in the centers of said disks by the througlrbolts lc 7i', or by ordinary bolts or rivets, as shown and described.

5. -In au elevator dredging-niachine having tumblers formed with any number of plane faces, the combination of layers of oak m on, or other partially elastic and durable material,

with the outer sheating-plates ol' steel, Z l, thel -layers m m being interposed 'between the sheathing-plates Z I and the shell of the tumbler H, and the whole riveted -or bolted together, substantially as and for the purposes specified.

JOHN KENNEDY.

VitIiesses:

GILBERT FRANeIs VANLIcss, y 0f the Uitg ofiloatrca, Merchant. F. GRIFFIN,

0f the City of lllomreal, Gentleman. 

